{"title":"二氧化锰涂层项链状CoFe@carbon纳米纤维复合材料，具有优越的电磁波吸收能力。","authors":"Yiliang Liu, Ying Lin, Zhixin Cai, Yongzhen Ma, Hongwei Zhou, Wei Chai, Qibin Yuan, Haibo Yang","doi":"10.1039/d4mh01783h","DOIUrl":null,"url":null,"abstract":"<p><p>With the rapid development of modern electronic technology, electromagnetic wave (EMW) absorption materials play a crucial role in solving the problem of electromagnetic radiation pollution. By designing unique microstructures or composite magnetic components, the EMW attenuation ability of carbon nanofibers (CNFs) can be enhanced. However, the ultra-high conductivity of CNFs leads to impedance mismatch, necessitating the introduction of components that can rapidly optimize dielectric properties for improved impedance matching. In this study, Co<sub>0.7</sub>Fe<sub>0.3</sub>@CNFs@MnO<sub>2</sub> (CFCM) was fabricated by coating MnO<sub>2</sub> nanosheets on necklace-like CoFe@carbon nanofiber composites. The coated MnO<sub>2</sub> nanosheets not only enhance the EMW attenuation ability, but also improve impedance matching. The results indicate that the minimum reflection loss of the sample is -62.7 dB, and the effective absorption bandwidth reaches 6.5 GHz. This work presents a valuable method to prepare outstanding EMW absorption materials with a necklace-like 3D network hierarchical structure.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2000,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"MnO<sub>2</sub>-coated necklace-like CoFe@carbon nanofiber composites for superior electromagnetic wave absorption.\",\"authors\":\"Yiliang Liu, Ying Lin, Zhixin Cai, Yongzhen Ma, Hongwei Zhou, Wei Chai, Qibin Yuan, Haibo Yang\",\"doi\":\"10.1039/d4mh01783h\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>With the rapid development of modern electronic technology, electromagnetic wave (EMW) absorption materials play a crucial role in solving the problem of electromagnetic radiation pollution. By designing unique microstructures or composite magnetic components, the EMW attenuation ability of carbon nanofibers (CNFs) can be enhanced. However, the ultra-high conductivity of CNFs leads to impedance mismatch, necessitating the introduction of components that can rapidly optimize dielectric properties for improved impedance matching. In this study, Co<sub>0.7</sub>Fe<sub>0.3</sub>@CNFs@MnO<sub>2</sub> (CFCM) was fabricated by coating MnO<sub>2</sub> nanosheets on necklace-like CoFe@carbon nanofiber composites. The coated MnO<sub>2</sub> nanosheets not only enhance the EMW attenuation ability, but also improve impedance matching. The results indicate that the minimum reflection loss of the sample is -62.7 dB, and the effective absorption bandwidth reaches 6.5 GHz. This work presents a valuable method to prepare outstanding EMW absorption materials with a necklace-like 3D network hierarchical structure.</p>\",\"PeriodicalId\":87,\"journal\":{\"name\":\"Materials Horizons\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":12.2000,\"publicationDate\":\"2025-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Horizons\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1039/d4mh01783h\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Horizons","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4mh01783h","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
MnO2-coated necklace-like CoFe@carbon nanofiber composites for superior electromagnetic wave absorption.
With the rapid development of modern electronic technology, electromagnetic wave (EMW) absorption materials play a crucial role in solving the problem of electromagnetic radiation pollution. By designing unique microstructures or composite magnetic components, the EMW attenuation ability of carbon nanofibers (CNFs) can be enhanced. However, the ultra-high conductivity of CNFs leads to impedance mismatch, necessitating the introduction of components that can rapidly optimize dielectric properties for improved impedance matching. In this study, Co0.7Fe0.3@CNFs@MnO2 (CFCM) was fabricated by coating MnO2 nanosheets on necklace-like CoFe@carbon nanofiber composites. The coated MnO2 nanosheets not only enhance the EMW attenuation ability, but also improve impedance matching. The results indicate that the minimum reflection loss of the sample is -62.7 dB, and the effective absorption bandwidth reaches 6.5 GHz. This work presents a valuable method to prepare outstanding EMW absorption materials with a necklace-like 3D network hierarchical structure.
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